How to Fish casino guide: the Island 4 Lucky Bait roulette, why green 35x returns less than red 2x, the All In achievement, and Reel of Fortune skins.
How to Fish Casino: The Lucky Bait Roulette, Explained
The how to fish casino is the Lucky Bait Casino inside the Casino Barn on Island 4, and it opens after you beat the Pufferfish and hand in its fin to earn the island coordinates. The roulette lets you stake any item you are carrying. Red or black pays 2x, and green pays 35x from a single slot out of 37. Both bets lose money in the long run — red and black return about 0.973 per dollar staked and green returns about 0.946 — so treat the whole building as an achievement and skin machine, not an income source.
The short version:
- Where: Island 4, the Casino Barn, unlocked through the Pufferfish quest chain
- Roulette: stake any carried item; red or black x2, green x35, and only 1 of 37 slots is green
- No pity: lose the spin and everything on the table is gone
- Reel of Fortune: throw a Drip creature or boss loot into the hole above the machine for weapon, rod and boat skins, and only the thrower gets the skin
Where the How to Fish Casino Is
Island 4 is the rock island, reached late. The unlock runs through the third island: the Grill Master wants a shark, the tourist wants an endangered creature, and handing over the requested fish gives you the Carrot lure and eventually the Pufferfish coordinates. Kill the Pufferfish (18,000 HP, 34 contact damage, $12,000 base value), deliver the fin, and the tourist hands over Island 4.
Island 4 is also where the Tuna becomes bait for the Albatross, so most players arrive with a full wallet and immediately find the fastest way to empty it. The casino and the rest of the game's content are listed on the Steam store page.
How the Roulette Table Actually Works
The mechanic is unusual for the genre: there are no chips. You place items from your inventory on the table, spin, and the result applies to whatever you put down:
- Red or black pays 2x. Eighteen slots each out of 37, so a hit is a 48.6% chance.
- Green pays 35x. One slot out of 37, so a hit is a 2.7% chance.
- Winning does not cash you out automatically. You can leave the stake and winnings on the table and spin again, compounding the value instead of resetting it.
- Losing wipes the table. The items you committed are gone. There is no insurance, no partial refund, and no pity counter that improves your odds after a streak of losses.
Because you stake inventory rather than chips, the casino is a value-conversion machine: fish value goes in, and either a multiplied value or nothing comes out. That is why the cooking multiplier matters more here than anywhere else.
Roulette EV: What 35x Really Pays
Here is the part every other casino page skips. Run both bets through expected value and the marketing disappears:
| Bet | Payout | Hit chance | Expected return per $1 |
|---|---|---|---|
| Red | 2x | 18/37 = 48.6% | 0.973 |
| Black | 2x | 18/37 = 48.6% | 0.973 |
| Green | 35x | 1/37 = 2.7% | 0.946 |
Every row sits below 1.00, so the house keeps a slice of any long session. Stake $1,000 of fish value on red and the long-run return is about $973; stake the same $1,000 on green instead and it is about $946.
The counterintuitive result matters more than the headline: green is the worse bet, not the better one, even though it pays 35x against red's 2x. The hit chance is only 2.7%, so landing green at least once in 25 spins is close to a coin flip — about 49.6%.
The only number that decides whether a bet is good is payout multiplied by probability. For green that is 35 times 1/37, which is 0.946. For red or black it is 2 times 18/37, which is 0.973. If you are going to spin anyway, the boring bet is the mathematically better one.
Official source: How to Fish patch notes on Steam — the official announcements confirming the current build, and the Steam community guides hub where achievement routes for the casino are tracked.
All In: The Cheapest Way to Bet Green and Win
The All In achievement simply asks you to bet green and win. It does not care what you staked, which turns it into one of the cheapest achievements in the game if you plan it correctly.
- Keep two or three junk catches in your inventory before you sail to Island 4. Cheap creatures like a Piranha ($4), Brown Crab ($3) or Shrimp ($5) are ideal, and non-creature pickups such as a Clam ($1) are even cheaper.
- Stake the cheapest item, spin green, and repeat. Each attempt costs you one low-value item and nothing else.
- With a 2.7% hit rate, expect the achievement somewhere around 25 to 40 spins. Worst case that is a few hundred dollars of junk, which is less than one wasted boss lure.
- Do not chase All In with a boss trophy on the table; that risks thousands for an achievement that pays nothing extra.
Rich! Millionaire: The 100,000 Threshold Math
The second casino-relevant achievement, Rich! Millionaire, wants you to sell 100,000 worth of goods. Green x35 is the fastest shortcut, but only if you do the arithmetic first:
| Step | Number |
|---|---|
| Target sale value | $100,000 |
| Divide by the green multiplier | 100,000 / 35 = about 2,858 |
| Value you must show on the table (cooked) | about $2,858 or more |
| Raw fish needed, since cooked is 1.5x | about 1,906 or more |
Two details push the practical number higher. Every item rolls a random weight (gaussian around 1.0, clipped between 0.25 and 1.75), so a stake worth 2,900 on paper can land under 2,858. And a burnt item is worth 0.1x, which ruins the whole plan.
So cook the stake until the inspect readout shows roughly 3,200 of value, then bet green. Press F while holding the item: the readout refreshes live, so you know exactly what goes on the table.
Cooking multiplies value by 1.5, so a cooked stake needs to be a third smaller than a raw one. Pull food off the grill the moment the F readout shows 1.5 and never leave it long enough to burn into 0.1. The cooking guide breaks down the full multiplier chain.
Reel of Fortune: Skins, Drip Creatures and Boss Loot
The roulette is not the only machine in the building. The Reel of Fortune is the slot machine, and it does not take money at all. To start it you throw a Drip creature or a boss trophy into the hole above the machine.
- Drip creatures are the rainbow-named rare variants. They respawn indefinitely, which makes them a renewable token rather than a one-time sacrifice. The Drip fish guide covers where to farm them.
- Boss loot works too, but the five named quest trophies — Albatross Head, Giant Piranha Skeleton, Pufferfish Fin, Spider Crab Shell and Whale Fin — are listed at a worth of 0. They are quest objects, so they are the worst things to feed a machine.
- The payout is cosmetic. Skins apply to weapons, rods and boats. The game publishes no drop rates, so any page quoting exact skin odds is guessing.
In co-op, the player who throws the Drip creature into the hole receives the skin. Teammates standing next to you get nothing from your roll. If a friend wants a specific skin, they have to be the one holding the token and throwing it. This is the single most common casino misunderstanding in multiplayer lobbies.
What to Stake and What to Leave in the Box
Because the roulette accepts inventory items, discipline matters more than luck:
| Stake | Verdict |
|---|---|
| Cooked mid-tier fish showing about 3,200 value | The Rich! Millionaire play |
| Cheap junk fish and $1 pickups | The All In play; each spin costs almost nothing |
| Boss bodies worth $11,000 to $15,000 | Unnecessary; one hit on a 3,200 stake already clears the target |
| Quest trophies worth 0 | Never. They pay 35x of nothing |
| Weapons and tools | Only if you accept losing them |
Two systems soften the blow: since 1.0.10 drops carry across saves (up to 64 items, prioritising weapons, tools and quest items), and since 1.0.12 Steam Cloud keeps those saves in sync.
Is the How to Fish Casino Worth It?
Honest answer: for two achievements and a handful of skins, yes. For money, no.
| Your goal | Gamble? |
|---|---|
| All In achievement | Yes, with junk stakes, then reroll the slot machine afterwards |
| Rich! Millionaire | Yes, once, with a cooked stake near 3,200 |
| Saving for the Assault Rifle ($20,000) | No. The gun already costs $20,000, and its last two damage tiers add $5,125 and $5,800 |
| Steady income | No. Sell cooked fish instead |
A good run has a real ceiling, but the floor is the total loss of your stake. If the money is earmarked for a gun upgrade, the casino is a delay, not a shortcut. The money farming guide covers the route without the 2.7% coin flip.
FAQ
Is the how to fish roulette rigged?
No hidden manipulation is needed. Red and black hit 18 of 37 slots at 2x (0.973 return) and green hits 1 of 37 at 35x (0.946). That gap is the house edge, built into the payout table instead of hidden behind it.
How do I get the All In achievement?
Bet green and win. Stake the cheapest item you own — a $1 Clam or a $3 to $5 junk fish — and spin until it lands, roughly once every 37 spins. Check the achievements guide if you are chaining unlocks.
What do you put in the Reel of Fortune?
A Drip creature or a boss trophy, thrown into the hole above the slot machine. The output is a weapon, rod or boat skin, and only the thrower receives it.
Is gambling worth it in How to Fish?
Only for the achievements and the skins. Every bet returns less than 1.00 per dollar in expectation, so the casino is a value sink next to selling the same fish. Treat it as entertainment with a fixed budget, not a farming route.
Can you lose quest items at the casino?
Yes. Anything on the table is gone when the spin loses, and the five boss trophies are worth 0 anyway. Keep the Whale Fin and the Pufferfish Fin until the story stops asking for them.
Related Guides
- Money fast guide — the reliable route to the 100,000 sale the casino is supposed to shortcut
- Cooking guide — the 1.5x multiplier that decides how big your stake has to be
- Drip fish guide — farming the renewable Reel of Fortune tokens
- All achievements guide — where All In and Rich! Millionaire sit in the full list
- Boss guide — the Pufferfish unlock and the real boss trophy values
- Fishipedia checklist — tracking what not to gamble away
More How to Fish Guides
Boat upgrades in How to Fish explained: engine and storage parts, the permanent radar mount, why boats come last in purchase orders and when speed pays off.
How to Fish has no console build, so there is nothing to cross: Steam PC, Deck and GeForce NOW players share the same 8-player lobbies. Co-op facts for 2026.
Desert Island guide: the grill master's shark, the tourist's endangered creature, SMG attachment shopping, and beating the Pufferfish.
Dynamite does 200 explosion damage per stick in How to Fish — what that one-shots, how many sticks each boss needs, and the patch 1.0.11 self-damage rule.
The Fishipedia completion guide for How to Fish: logging every species, rare variant and drip entry with a checklist order that avoids wasted island trips.
Forest Island guide: the five-leech quest and special bait, where guns unlock, the girl's big yummy fish, and the Giant Piranha fight.
How to beat the Giant Piranha in How to Fish: the $1 Leech Bait summon chain, 2,500 HP solo tactics, and what patch 1.0.12 did and did not change.
Every island in How to Fish in unlock order — Lighthouse, Forest, Desert, Rocks, Military Volcano — with the boss trophies that gate each one.